CN206676200U - Source of the gas humidity freeze-day with constant temperature system - Google Patents
Source of the gas humidity freeze-day with constant temperature system Download PDFInfo
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- CN206676200U CN206676200U CN201720115788.XU CN201720115788U CN206676200U CN 206676200 U CN206676200 U CN 206676200U CN 201720115788 U CN201720115788 U CN 201720115788U CN 206676200 U CN206676200 U CN 206676200U
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Abstract
The utility model provides a kind of source of the gas humidity freeze-day with constant temperature system, including source of the gas subsystem（1）With insulating box subsystem（2）, wherein the source of the gas subsystem（1）By air compressor（11）, suspended body flowmeter（12）, dried-air drier（13）And mass flowmenter（14）Form, the insulating box subsystem（2）It is made up of multiple valves and multiple infiltration rooms.Source of the gas humidity freeze-day with constant temperature system provided by the utility model, the mode of volume control device is employed so that the degree of accuracy greatly improves, accurate adjustment flow is realized by the use of mass flowmenter so that overall freeze-day with constant temperature system is not only dried, while ensure that precision top adjustment speed is fast.
Description
Technical field
A kind of source of the gas humidity freeze-day with constant temperature system being used in osmosis humidity generator is the utility model is related to, belongs to ring
Border fields of measurement.
Background technology
The measurement and control of humidity, it is significant in the development of the national economy.Because humidity affects nature
Physics, chemistry and bioprocess；Influence the characteristic of many aspects of gas, including heat, electricity, light and transmittance process；It can also influence
Moisture in material, the size of material is caused to change, humidity can also cause corrosion of metal in addition, or even can determine
Final and decisive juncture of biology etc..The measurement of humidity is also widely used for Aeronautics and Astronautics, storage, meteorology, electric power, oil with control
The fields such as chemical industry, semiconductor manufacturing, atomic energy, microelectronics, ultra-pure gases feed system.Moisture measurement turns into international standard
Change tissue and international relevant technical committee's focus of attention.In ISO9000 Quality System certification, ISO17025 Laboratory Accreditations
In humid control is clearly required.One good environmental quality can reduce the technology controversial issue thus triggered, ensure production
Quality.In addition, with the development of the modern industries such as petrochemical industry, electronics, electric power, metallurgy, aerospace, atomic energy, ultralow temperature etc.
The fast development of advanced science technology, low humidity measurement is increasingly subject to the attention of people with control, and finds broad application.With stone
The advanced science technology such as the development of the modern industries such as oiling work, electronics, electric power, metallurgy, aerospace, atomic energy, ultralow temperature it is quick
Development, also increasingly increases for low humidity measurement demand at present.
Osmosis humidity generator designs the principle based on osmosis.The principle of osmosis is with certain based on dry carrier gas
Flow velocity takes away the aqueous vapor for penetrating a certain film.When the side of film contacts with pure water, and opposite side flows through one dry gas, due to film two
The aqueous vapor partial pressure of side is different, and then aqueous vapor is permeated by film to opposite side.The aqueous vapor constant flow rate infiltrated by osmos tube
Dry carrier gas all carry out, by uniformly mixing after export, obtain the certain moisture of water vapour content.When change temperature,
During the osmos tube of dry gas flow or the different permeabilities of replacing, the gas with regard to different humidity can be obtained.Material permeance permeable membrane oozes
Saturating rate depends on property, constituent, the area of permeable membrane, temperature and the barometric gradient of film both sides of material in itself used.
According to national standard JJG2046-90《Psychrometry utensil verification system》, the calibration of low humidity measuring instrumentss can take figure
Two ways shown in 1.It can be seen that humidity generator is essential in humidity instrument calibration process.In order that
Humidity generator can farthest play a role, and air is dried processing formation regime flow meets various indexs
It is required that low humidity air be the inevitable configuration of humidity generator, but similar work(can be realized currently without preferable device
Energy.
Utility model content
In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is that providing a kind of source of the gas humidity constant temperature does
Drying system.
In order to achieve the above object, the utility model takes following technical scheme：
A kind of source of the gas humidity freeze-day with constant temperature system, including source of the gas subsystem and insulating box subsystem, wherein the source of the gas is sub
System is made up of air compressor, suspended body flowmeter, dried-air drier and mass flowmenter, and the insulating box subsystem is by multiple
Valve and multiple infiltration rooms are formed；The air compressor, suspended body flowmeter, dried-air drier and mass flowmenter are according to air
The direction of entrance is set gradually, and the multiple infiltration room includes the first infiltration room, the second infiltration room and the 3rd infiltration room, and three ooze
Saturating room is distributed symmetrically, and is set up in parallel, and the multiple valve includes the first valve and the second valve, is separately positioned on three infiltration rooms
Both ends.
Preferably, above-mentioned multiple infiltration chamber interiors are provided with osmos tube, and osmos tube is polytetrafluoroethylene (PTFE) or polytetrafluoroethyl-ne
Alkene propylene material is made, wall thickness 0.3mm~0.5mm.
Preferably, above-mentioned osmos tube is placed in 100 DEG C of thermostat, is placed 24 hours, by the selected time interval cycle
Ground weighs the weight change of osmos tube, so as to draw the permeability of osmos tube.
Preferably, above-mentioned drying system first by oil-free air compressor the absorption air from surrounding environment, through overvoltage
Contract to gas pressurized while deoil, the infiltration room that gas enters in insulating box subsystem, mixed with vapor, suspended body flowmeter is set
Put between air compressor and dried-air drier；Mass flowmenter is arranged between source of the gas subsystem and insulating box subsystem.
Preferably, air compressor, suspended body flowmeter, dried-air drier and the matter that air passes through in source of the gas subsystem successively
Measuring flowmeter turns into dry carrier gas, then by insulating box subsystem, low humidity gases are formed behind multiple infiltration rooms.
Compared to prior art, source of the gas humidity freeze-day with constant temperature system provided by the utility model, flow control dress is employed
The mode put causes the degree of accuracy to greatly improve, and realizes accurate adjustment flow by the use of mass flowmenter so that overall constant temperature
Drying system is not only dried, while ensure that precision top adjustment speed is fast.
Brief description of the drawings
Fig. 1 (a) and Fig. 1 (b) is humidity calibrating indicating instrument block diagram；
Fig. 2 is the utility model source of the gas humidity freeze-day with constant temperature system structure diagram；
Fig. 3 (a) is A type structure osmos tube structural representations；
Fig. 3 (b) is Type B structure osmos tube structural representation；
Fig. 3 (c) is c-type structure osmos tube structural representation.
Reference：1- source of the gas subsystems；11- air compressors；12- suspended body flowmeters；13- dried-air driers；14- matter
Measure flowmeter；2- insulating box subsystems；21- first permeates room；22- second permeates room；23- the 3rd permeates room；The valves of 24- first
Door；The valves of 25- second；3- air；4- dries carrier gas；5- low humidity gases.
Embodiment
The utility model provides a kind of source of the gas humidity freeze-day with constant temperature system, to make the purpose of this utility model, technical scheme
And effect is clearer, clear and definite, the utility model is further described the embodiment that develops simultaneously referring to the drawings.It should manage
Solution, specific embodiment described herein only to explain the utility model, are not used to limit the utility model.
As shown in figure 1, source of the gas humidity freeze-day with constant temperature system provided by the utility model, including source of the gas subsystem 1 and constant temperature
Chest system 2, wherein source of the gas subsystem 1 are by air compressor 11, suspended body flowmeter 12, dried-air drier 13 and mass flowmenter
14 are formed, and insulating box subsystem 2 is made up of multiple valves and multiple infiltration rooms；Air compressor 11, suspended body flowmeter 12, air
The direction that drying machine 13 and mass flowmenter 14 enter according to air 3 is set gradually, and multiple infiltration rooms include the first infiltration room
21st, room 23 is permeated in the second infiltration room 22 and the 3rd, and three infiltration rooms are distributed symmetrically, are set up in parallel, multiple valves include the first valve
The valve 25 of door 24 and second, it is separately positioned on the both ends of three infiltration rooms.
Source of the gas subsystem 1 includes oil-free air compressor 11, suspended body flowmeter 12, air dryer 13 and mass flow
Meter 14, it provides for humidity generator and dries carrier gas.The effect for drying carrier gas is in vapor caused by infiltration room and osmos tube
It is sufficiently mixed, the carrier as vapor.In the present embodiment, using an oil-free air compressor and a dried-air drier
To prepare dry carrier gas.Oil-free air compressor absorption air from surrounding environment, deoiled simultaneously to gas pressurized through overcompression.
The purpose deoiled is to subsequently reach optimum drying effect in drying machine.
Certain pressure and flow velocity are provided with by the gas of air compressor, afterwards air inlet drying machine.It is final defeated
The water content gone out in low humidity gas should be all as caused by osmos tube, so can be according to the material of osmos tube, shape, temperature
Degree calculates permeability, so as to produce satisfactory low humidity gas.It it requires the water content pole of the carrier of vapor
Its is low, reaches negligible degree.After dried-air drier, gas mixes into the infiltration room in insulating box with vapor
Close.
In order to reach the purpose of regulation flow, a float-type is connected between air compressor and dried-air drier
Meter；A mass flowmenter is connected between dried-air drier and insulating box.The effect of suspended body flowmeter is coarse adjustment flow, to essence
Spend less demanding, but because the gas of air compressor output has larger pressure, thus float stream is required in terms of intensity
Gauge can bear larger pressure.The effect of mass flowmenter is accurate adjustment flow, dries the flow of carrier gas and oozing for osmos tube
Saturating rate has together decided on the humidity of final output gas, so the requirement to mass flowmenter is precision height, governing speed is fast.
Because osmosis humidity generator belongs to low dew point standard humidity generator, therefore source of the gas is wanted using dry air
Ask the dew point of source of the gas to be less than -70 DEG C, dried-air drier need to be increased processing is dried to the gas of input.
The conventional active aluminum oxide of adsorbent of drying machine and molecular sieve, for adsorption capacity, both adsorbents are all
It is very outstanding.Also synthesis possesses many excellent physics and chemical property to activated alumina while having powerful adsorption capacity.
Therefore, in most of drier first choice activated aluminas, especially in the case of heatless regeneration, activated alumina almost obtains high
In the inevitable choice of -40 DEG C of dew-point temperature compressed airs.But adsorption capacity of the adsorbent under low moisture environment can not show a candle to
Molecular sieve, so obtaining low drying compressed air, such as when dew-point temperature is less than -60 DEG C, then need to select molecular sieve.
The characteristics of molecular sieve heat endurance is good, chemical stability is high and absorption property is strong.For adsorption property, with activity
Other adsorbents such as charcoal, silica gel, aluminum oxide compare, and are characterized in：
(1) characteristic of the selective absorption of molecular sieve, because the pore pore size of molecular sieve is certain, can only inhale
It is attached can be by the molecule in these ducts, for the different molecule of shapes and sizes, molecular diameter is bigger than aperture to be entered
The inside of pore.
(2) in molecular sieve pore passage, with respect to the phenomenon that hole wall can produce field of force superposition, its adsorptivity is made to be significantly improved, therefore
Still there is sizable adsorption capacity at higher temperatures, such as in the case where water vapor pressure is relatively low, adsorbents more other than silica gel etc. have
Higher adsorption capacity, and can also keep higher adsorption capacity in high temperature.
(3) molecular sieve is polar adsorbent, and its suction-operated depends not only on adsorbed material molecular diameter, and by it
The influence of polarity, such as to polar molecule, especially there is very big affinity to water.
Molecular sieve has 3A, 4A, 5A three types.The aperture of 5A molecular sieves about 5A, commonly referred to as calcium molecular sieve.It, which is removed, has
Possessed by 3A, 4A molecular sieve outside effect, the organic solvent such as also adsorbable C3-C4 n-alkanes, chloroethanes, bromoethane, butanol.
Flow controller uses mass flowmenter, and the mass flowmenter degree of accuracy greatly improves than before, and the degree of accuracy is reachable
1%, meet the needs that osmosis humidity occurs.
Insulating box subsystem 2 is by three infiltration rooms：First infiltration room 21, second permeate room the 22, the 3rd permeate room 23 and
Two valves：First valve 24 and the second valve 25 form.The distribution of three infiltration rooms should be symmetrical, so be advantageous to heat
Amount is uniformly distributed, while suitable material is selected in selection, accomplishes to not only improve heat conduction, and can enough mitigates weight
Amount.It is further noted that the necessary synchronism switching of the valve at infiltration room both ends, so just can guarantee that the gas of different humidity not
It can interfere.
Osmos tube is placed with room is permeated, conventional osmos tube type there are three kinds, as shown in Figure 3.What the system used
It is Type B structure, it is main to consider convenient make.Because A types structure needs osmos tube and stainless steel tube to connect；C-type structure
Osmos tube and glass tube is needed to connect.Both link sealing deficiencies, it is easy to be caused by sealing bad and producing
Raw moisture leakage.
Configuration to osmos tube, it is the material for selecting suitably to do osmos tube first.The general polytetrafluoro for choosing stable performance
Ethene or polytetrafluoroethylene (PTFE) propylene material, it is desirable to even tube wall, zero defect and mechanical damage.When the pipe thickness of osmos tube is more than
Permeability is smaller during 0.5mm, insufficient strength when wall thickness is less than 0.2mm, is typically chosen tubing of the wall thickness in 0.3mm~0.5mm.No
Same infiltrating area has different permeabilities, and the geometric parameter of osmos tube can be designed as needed.
Next to that the pretreatment of osmos tube.Because the material and its density of infiltration rate and film, thickness, effective permeable face
Product, the physical characteristic (such as hydrophilic or hydrophobic) of material and the water vapor partial pressure difference of film both sides are relevant.Water wetted material is compared with hydrophobic material
Material has higher permeability, and the former generally contains material that is more water-soluble or being taken by water quenching than the latter.These materials
If do not removed thoroughly its infiltration rate to water will be made to be changed with the time, so as to influence the stability of permeability.So
Need to be pre-processed when making osmos tube, cleaned and soaked with water and appropriate organic solvent, and than work temperature
Spend at slightly higher temperature and activate (burin-in process) a period of time, this is to obtain the essential program of stable permeance property.
It is finally the permeability demarcation of osmos tube., can not due to the reason such as manufacture craft and the inhomogeneities of material structure
The identical osmos tube of permeability can be produced.Therefore, then there is different ooze for different osmos tubes under same environment
Saturating rate.For each osmos tube, the numerical value of its permeability will be demarcated individually, and the method for demarcation is to use weight method.Examine
Consider cast, vapour pressure property and suitable permeability, osmos tube is generally demarcated at 100 DEG C.Its method is to permeate
Pipe is placed in 100 DEG C of thermostat, places the regular hour, usually 24h, infiltration is weighed by selected time interval periodically
The weight change of pipe, so as to draw the permeability of osmos tube.
Operation principle of the present utility model is：Air 3 is successively by the air compressor 11 in source of the gas subsystem 1, float
Turn into after flowmeter 12, dried-air drier 13 and mass flowmenter 14 and dry carrier gas 4, then by insulating box subsystem 2, from more
Individual infiltration room (21,22,23) forms low humidity gas 5 afterwards.
Dried-air drier 13 prepares dry carrier gas.Absorption air 3 from surrounding environment of oil-free air compressor 11, pass through
Compress and pressurize while deoil to gas 3.The purpose deoiled is to subsequently reach optimum drying effect in the drying machine 13 of air 3
Fruit.Certain pressure and flow velocity are provided with by the gas of air compressor 11, afterwards air inlet drying machine 13.In design side
In case, the water content in final output low humidity gas should be all as caused by osmos tube, so can be according to osmos tube
Material, shape, temperature calculate permeability, so as to produce satisfactory low humidity gas.It it requires the load of vapor
The water content of body is extremely low, reaches negligible degree.After dried-air drier 13, gas enters insulating box subsystem 2
In infiltration room 21,22,23, mixed with vapor.In order to reach the purpose of regulation flow, done in air compressor 11 and air
A suspended body flowmeter 12 is connected between dry machine 13；A quality is connected between dried-air drier 13 and insulating box subsystem 2
Flowmeter 14, as shown in Figure 2.The effect of suspended body flowmeter 12 is bigness scale flow, not high to required precision, but due to air pressure
The gas that contracting machine 11 exports has larger pressure, thus requires that suspended body flowmeter 12 can bear larger pressure in terms of intensity
Power.The effect of mass flowmenter 14 is accurate measurement flow, and the permeability of the flow and osmos tube of drying carrier gas has together decided on finally
The humidity of output gas, so the requirement to mass flowmenter 14 is precision height, stability is good.
Compared to prior art, source of the gas humidity freeze-day with constant temperature system provided by the utility model, flow control dress is employed
The mode put causes the degree of accuracy to greatly improve, and realizes accurate adjustment flow by the use of mass flowmenter so that overall constant temperature
Drying system is not only dried, while ensure that precision top adjustment speed is fast.
It is understood that for those of ordinary skills, can according to the technical solution of the utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (2)
- A kind of 1. source of the gas humidity freeze-day with constant temperature system, it is characterised in that：The source of the gas humidity freeze-day with constant temperature system includes source of the gas System（1）With insulating box subsystem（2）, wherein the source of the gas subsystem（1）By air compressor（11）, suspended body flowmeter （12）, dried-air drier（13）And mass flowmenter（14）Form, the insulating box subsystem（2）By multiple valves and multiple ooze Saturating room is formed；The air compressor（11）, suspended body flowmeter（12）, dried-air drier（13）And mass flowmenter（14）According to Air（3）The direction of entrance is set gradually, and the multiple infiltration room includes the first infiltration room（21）, second infiltration room（22）With Three infiltration rooms（23）, three infiltration rooms are distributed symmetrically, are set up in parallel, the multiple valve includes the first valve（24）With the second valve Door（25）, it is separately positioned on three both ends for permeating room.
- 2. source of the gas humidity freeze-day with constant temperature system as claimed in claim 1, it is characterised in that：The multiple infiltration chamber interior is all provided with Osmos tube is equipped with, osmos tube is made up of polytetrafluoroethylene (PTFE) or polytetrafluoroethylene (PTFE) propylene material, wall thickness 0.3mm~0.5mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201621226984 | 2016-11-15 | ||
| CN2016212269846 | 2016-11-15 |
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| Publication Number | Publication Date |
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| CN206676200U true CN206676200U (en) | 2017-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720115788.XU Expired - Fee Related CN206676200U (en) | 2016-11-15 | 2017-02-08 | Source of the gas humidity freeze-day with constant temperature system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621725A (en) * | 2016-11-15 | 2017-05-10 | 钟玲珑 | Constant-temperature gas source humidity drying system |
| TWI666435B (en) * | 2018-11-20 | 2019-07-21 | 宇田控制科技股份有限公司 | Test system for dew point sensors |
-
2017
- 2017-02-08 CN CN201720115788.XU patent/CN206676200U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621725A (en) * | 2016-11-15 | 2017-05-10 | 钟玲珑 | Constant-temperature gas source humidity drying system |
| TWI666435B (en) * | 2018-11-20 | 2019-07-21 | 宇田控制科技股份有限公司 | Test system for dew point sensors |
| CN111198205A (en) * | 2018-11-20 | 2020-05-26 | 诚田自动化仪表（上海）有限公司 | Dew point sensor's test system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171128 Termination date: 20190208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |